Hoisting apparatus.



PATENTED NOV. 12, 190?.

0. K. HOLST. HOISTING APPARATUS.

APPLIOATIOH FILED AUG. 21, 1907.

- ATTORNEYS-f 3 WIT/15.9353

OSCAR K. HOLSl, OF TOMPKINSVILLE, NElV @EFIGE.

YORK.

Specification of Letters Patent.

Patented Nov. 12, 1907.-

Applioation tiled August 21.1907. Serial No. 389.446.

concern:

ing Apparatus, oi which the following is a specification,

such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to ordinary hoisting machines and particula "o drum releasing devices; and the object of the invention is to provide an improved automatic spring to? releasing the drum when necessary.

The invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, said drawing being a sectional side view of a drum shaft, :1. gear wheel mounted thereon and connected therewith and one end portion of a drum which is loosely mounted on said shaft, and showing, also my inr proved automatic releasing spring device.

In the drawinglorming pa 't of this specification, 1 have shown at a the shaft oi hoisting machine or rip-- paratus of the class rel'erred to and secured to said shalt is a gear wheel. 5. Mounted loosely on the shaft a und movable longitudinally thereon in the usual manner is of which is a deep annular jacent to the drum an annular iriction device b adapted to lit in the g We 0 all these parts, including w the shaft a, wheel b, drum 0 having the head c and the nogethcr with the annular trio groove 0 formed the i tion device b oi the usual and well known con- 'struction.

In the practice of my invention, 1 secure to the side of the wheel 1), adjacent to the drum 0, a huh (I having an interior thread (1 and into which is screwed n sleeve 6 which normaliy psych-1 a predetermined distance from the hub c7 in the direction of the drum 6.

Mounted on the shaft (2 within the sleeve 0 and movable longitudinally" on said shaft is a. supplemental sleeve f on the outer and oi; which is screwed a collar f and the inner end of the sleeve f is provided with an outwardly directed .t we f and the sleeve e adjacent to its outer end is pro. ded with an inwardly directed flange 6 The i mgr: j of the sleeve f fits within the inner end of the e and the flanges f 3 and a form an annular space 9 in which is mounted a strong spiral spring I: which bears on said flanges. Between the uleevef and shaft a is a key a which permits said sleeve to slide on said shaft, but prevents it from turning thereon. V

Secured to the end of the drum 0 is a washer i of steel or other suitable material and the inner end of the sleeve ,j is adapted'to hear thereon.

In the operation of the appnratus, a hoisting rope or cable is wound on the drum (1, and. in the operation of hoisting, the drum c is forced in the direction ol the wheel I) and the annular friction device U lits in the annular groove 6 and turns the drum so as to wind the rope or cable thereon. When the operation ol hoisting is completed, the device for holding the drum in the position shown in the drawing, and so that it can be turned by the wheel b, is released and the spring h at once forces the drum in the direction of the arrow .r, and the said drum is released from the annular friction device b'- and rapidly rotates in the reverse direction so as to unwind the rope or cable therefrom.

The device or devices for forcing the drum into contact with the annular friction device b and for releasing said drum when the hoisting operation is completed in order that the drum may be forced in the direction of the arrow to are not shown for the reason that they form no part, of this invention, but it will be LUMlCISLOtKl that said device or devices are those usually employed.

' if at any time during the operation of the apparatus, the slcovc a should hour too hard on the end of the drum, the operation of the drum will turn said sleeve and force it into the collar (1 and the length oi the outer end of said sleeve may he so regulated, if desired, that it will not bear on the end of the drum or on the washer 1', under ordinary conditions.

It will be observed that thecollar/ operating in connection with the llangc e of the sleeve c limits the movement of the sleeve f in the direction of the drum, and said sleeve is always held in a certain relative position with relation to the sleeve c. I

By means of this construction I provide an automatic drum releasing spring for hoisting apparatus of the class described which is simple in construction and operation and facilitates the operation of apparatus of this class and renders the same more simple and el'iective.

Having fully described my invention, what I claim as new and desire to'secure by Letters Patent, is:

i. In an apparatus of the class described, a shaft, :1 drive wheel secured thereto, a drum mounted on said shaft and movable longitudinally thereof and provided with a head having a deep annular groove, an annular friction device secured to said wheel and adapted to fit in said groove, a hub secured to said wheel and through which said shaft passes, said hub being provided with an interior thread, a threaded sleeve mounted in said hub, another sleeve mounted on said shaft within said first named sleeve and movublc longitudinally on said shaft, one of said sleeves being provided with an inwardly and the other with an outwardly directed flange, a spring placed between said flanges,

,and means for limiting the longitudinal movement of the supplemental sleeve on said shaft.

2. In an apparatus of the class described, a shaft, :1 drive wheel secured thereto, a drum mounted on said shaft and movable longitudinally thereof and provided with a head having a deep annular groove, an annular-friction device secured to said wheel and adapted to fit in said groove, :1 huh secured to said wheel and through which said shaft passes, said hub being provided with an interior thread, a threaded sleeve mounted in said hub, another sleeve mounted on said shaft within said first named sleeve and movable longitudinally on said shaft; one of said sleeves being provided with an inwardly and the other with an outwardly directed flange, a spring placed between said flanges, and means for limiting the longitudinal movement of the 1() supplemental sleeve on said shaft, said drum being also provided with a washer on which the supplemental sleeve is adapted to bear.

In testimony that I claim the'foregoing as my invention I have signed my name in presence of the subscribing witnesses this 16th day of August 1907.

OSCAR K. HOLST.

Witnesses:

C. E. MULREANY,

A. R. APPLEMAN.

I I I i I I I I I 

